A drum brake pad stamping equipment

Abstract

The present invention relates to a drum brake pad stamping processing equipment, belonging to the technical field of drum brake pad processing equipment. The present invention includes a frame, a molding assembly and a punch that can move up and down are provided on the frame, a turntable is also provided on the frame, a loading station, a stamping station, a pressure holding station and a discharge station are provided on the outer periphery of the turntable, the punch is located at the stamping station, the molding assembly is provided with four groups and is evenly arranged on the turntable, the molding assembly includes a bottom mold, a top mold, a fixed shaft and a push rod, a torsion spring is connected between the push rod and the fixed shaft, the bottom end of the push rod is provided with an insert block that can move elastically, and the top mold is provided with a slot with an opening facing upwards. The turntable can rotate to a set angle in sequence to drive each molding assembly to rotate to each station in sequence. When the molding assembly rotates to the stamping station, the punch pushes the top mold to move downward for stamping, and pushes the push rod to swing downward. The present invention enables the stamping process and the pressure holding process to be carried out in different spaces, which can improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of drum brake pad processing equipment, in particular to a drum brake pad stamping processing equipment. Background Art

[0002] Drum brake pads are key components in automotive braking systems, providing friction when the vehicle slows or stops. Drum brake pads typically consist of a friction material and a metal backing plate. The friction material is typically a mixture of various organic and inorganic components, including fibers, fillers, binders, and other additives. During the friction material processing process, the selected raw materials must first be mixed evenly in proportion. A mold is then used to pre-press the mixed friction material into the desired shape. The pressed friction material is then held under pressure for a certain period of time to ensure optimal quality and performance.

[0003] The stamping mechanism in the prior art generally uses the power element in the stamping equipment to keep the upper die on the workpiece for a period of time after the stamping is completed to maintain the pressure of the workpiece. For example, the patent with authorization announcement number CN217251935U discloses a shield stamping forming mold, which includes a die, a punch, an upper die base, a first lower die, a second lower die, a baffle plate, a discharge plate and a lower die base. When using the mold for stamping, the blank is heated to the required temperature and placed on the upper surface of the die. The blank is positioned by the baffle plate. The press spindle is rotated by the machine tool clutch switch to drive the slider to drive the upper die part of the mold downward. The blank is pressed and formed under the action of the punch and the die, and the pressure needs to be maintained for a period of time after forming.

[0004] The device clamps the blank through the punch and die to maintain pressure. During the pressure holding period, the power component and the entire set of molds are occupied by the pressure holding process, and new blanks cannot be stamped. If batch processing is carried out, the pressure holding process will take a long time and the production efficiency will be slow. Summary of the Invention

[0005] The present invention provides a drum brake pad stamping processing equipment to solve the technical problem that when using the stamping equipment in the prior art to perform batch processing on drum brake pads, it is necessary to use a power element to tighten the mold to maintain the pressure of the product, resulting in the power element and the mold being occupied by the pressure maintaining process for too long, thereby affecting production efficiency.

[0006] In order to solve the above problems, the present invention provides a drum brake pad stamping processing equipment adopting the following technical solutions:

[0007] A drum brake pad stamping processing equipment includes a frame, a die pressing assembly and a punch that can move up and down are provided on the frame, and a turntable arranged horizontally and rotatable about a vertically extending axis is also provided on the frame. A loading station, a stamping station, a pressure holding station, and a discharge station are arranged sequentially and evenly on the outer circumference of the turntable, and the punch is located at the stamping station;

[0008] The molding assembly is provided with four groups and is evenly arranged on the turntable along the circumference of the turntable. The molding assembly includes a bottom mold fixed on the turntable, a top mold elastically movable up and down and arranged above the bottom mold, a fixed shaft fixed on the turntable and located above the top mold, and a top rod rotatably mounted on the fixed shaft. A torsion spring is connected between the top rod and the fixed shaft to keep the top rod in an inclined state. The bottom end of the top rod is provided with an insert block that can elastically move along the rod length direction of the top rod. The top mold is provided with a slot with an upward opening.

[0009] The turntable can rotate the set angle in sequence to drive each mold pressing component to rotate to each station in sequence. When the mold pressing component rotates to the stamping station, the punch pushes the top die to move downward for stamping, and pushes the ejector rod to swing downward. When the top die moves to the bottom limit position, the ejector rod swings to a vertical state, and the insert is inserted into the slot when the ejector rod swings to a vertical state.

[0010] By adopting the above technical solution, during the downward movement of the punch, it can not only drive the top die to move toward the bottom die, but also drive the push rod to swing toward the vertical state. When the top die moves downward to the bottom limit position, the push rod swings to the vertical state and the insert block at the bottom end of the push rod is inserted into the slot, so that the push rod is locked in the vertical state. The top die is pushed by the push rod and can still remain at the bottom limit position after being separated from the punch. In this way, after the punch leaves the top die, the top die can still be pressed on the workpiece to maintain pressure on the workpiece. Therefore, the molding assembly can be rotated to the pressure holding station for pressure holding. During the pressure holding process, another set of molding assemblies is rotated to the stamping station for stamping. The stamping process and the pressure holding process are independent of each other in space. While one workpiece is being stamped, the other workpiece is being pressure held. In this way, in the mass production process, the processing time can be greatly shortened and the production efficiency can be effectively improved.

[0011] Furthermore, the punch includes a pressure column and a pressure plate vertically connected to the pressure column. The bottom end of the pressure column is located below the pressure plate. During the downward movement of the punch, the pressure column pushes the top die to move downward, and the pressure plate pushes the ejector rod to swing downward.

[0012] Furthermore, a feeding mechanism is provided on the frame, which is located at the feeding station. The feeding mechanism includes a feeding box that can move radially along the turntable. The feeding box includes a feeding frame that is closed on all sides and penetrates from top to bottom, and a sealing member for sealing the bottom of the feeding frame. The sealing member and the feeding frame can move relative to each other when the feeding box moves to above the bottom mold, so as to open the bottom of the feeding box and allow the material in the feeding box to fall onto the bottom mold.

[0013] Using the above technical solution, the loading box includes a loading frame and a blocking piece that can move relative to the loading frame. When the loading box moves to above the bottom mold, the blocking piece is separated from the loading frame, and the bottom end of the loading frame is opened. The material falls toward the bottom mold under its own weight. The loading box does not need to be turned over to pour out the material inside, and the loading process will be simpler.

[0014] Furthermore, the feeding frame and the blocking member can slide relative to each other in the radial direction of the turntable, and an elastic member that can extend and retract along the radial direction of the turntable is connected between the two. The elastic member keeps the blocking member in a state relative to the feeding frame in the upper and lower directions. The feeding mechanism also includes a baffle installed on the frame. The baffle and the blocking member block each other in the radial direction of the turntable. When the feeding box moves to the set position above the bottom mold, the blocking member is blocked by the baffle and staggered with the feeding frame, so that the material in the feeding box falls on the bottom mold.

[0015] With this technical solution, before the loading box moves above the bottom mold, the loading frame and the blocking piece move synchronously, keeping the bottom of the loading frame blocked by the blocking piece to prevent material from falling. When the loading box moves above the bottom mold, the blocking piece is blocked by the baffle and no longer moves forward. The loading frame continues to move forward, opening its bottom end and pushing the material on the blocking piece forward, causing it to fall into the groove on the bottom mold, completing the loading process. Simply using the baffle to block the blocking piece allows the loading frame and the blocking piece to be staggered, achieving loading. The structure is simple and ingenious.

[0016] Furthermore, a reset mechanism is provided on the frame, which is located at the discharging station. The reset mechanism includes a top block and a reset push rod. The top block is movably installed on the top mold and is located below the insert block inserted into the slot. The reset push rod is movably installed on the frame. The reset push rod is transmission-connected to the top block. The reset push rod can move toward the turntable to drive the top block to move upward, so that the top block pushes the insert block out of the slot.

[0017] By adopting the above technical solution, the reset push rod drives the ejector block to move upward during the process of moving toward the turntable, so that the ejector block pushes the insert block out of the slot. Then, the ejector rod swings upward and resets under the action of the torsion spring. The ejector rod is no longer pressed between the fixed shaft and the top mold. The top mold elastically resets upward to expose the workpiece on the bottom mold. The reset method is simple, and it is easy to remove the workpiece after resetting, and it is also easy to rotate to the loading station for processing the next brake pad.

[0018] Furthermore, the top block is a vertically extending screw, which is fixed in the top mold to prevent rotation. A gear is spirally sleeved on the outside of the screw, and the gear is fixed in the upper and lower positions on the top mold. A rack that can elastically slide in the horizontal direction is provided in the top mold, and the rack is engaged with the gear. The reset push rod can push the rack to slide in the process of moving toward the turntable to drive the gear to rotate, thereby driving the screw to move upward to push the insert out of the slot.

[0019] By adopting the above technical solution, the reset push rod is connected to the top block through the rack and gear to drive the top block to move up and down. The transmission structure is simple and easy to arrange.

[0020] Furthermore, the bottom mold is provided with a stamping channel running through from top to bottom and a discharge channel extending radially along the turntable. The discharge channel is closed at one end close to the center of the turntable and open at the other end. The discharge channel is located at the bottom of the stamping channel and is connected to the stamping channel. A support block is slidably installed in the discharge channel. A second elastic member is connected between the support block and the bottom mold. The second elastic member applies an elastic force to the support block toward the center of the turntable, so that the support block remains in a state of blocking the bottom end of the stamping channel. The bottom end of the stamping channel is blocked by the support block to form a stamping chamber.

[0021] By adopting the above technical solution, the support block blocks the bottom end of the stamping channel to form a stamping chamber, and the support block can slide in the discharge channel. After the workpiece processing is completed, the support block is slid along the discharge channel to the side of the stamping channel, and the workpiece can be moved downward into the discharge channel. After that, the support block is elastically reset under the action of the elastic member 2, and the workpiece that falls into the discharge channel can be pushed out of the discharge channel for easy discharge.

[0022] Furthermore, a discharge mechanism is provided on the frame, which is located at the discharge station. The discharge mechanism includes a blowing pipe and a discharge push rod. The blowing pipe is movably installed on the frame along the radial direction of the turntable. The air outlet end of the blowing pipe lags behind the end of the reset push rod close to the turntable in the horizontal direction, so that the air outlet end of the blowing pipe can be inserted between the top mold and the bottom mold after the top mold is reset upward.

[0023] The discharge push rod and the support block block each other in the radial direction of the turntable, and the end of the discharge push rod close to the turntable is ahead of the air outlet end of the blowing duct in the horizontal direction, so that the discharge push rod can push the support block away before the air outlet end of the blowing duct moves to above the stamping chamber. The air outlet end of the blowing duct can blow air downward to blow the brake pad stuck in the stamping channel into the discharge channel. After the brake pad enters the discharge channel, the discharge push rod moves back to the turntable to elastically reset the support block and push the center of gravity of the brake pad to the outside of the turntable.

[0024] By adopting the above technical solution, the reset push rod drives the ejector block to move upward to reset the ejector rod and the ejector die, and after the discharge push rod pushes the support block to the side of the stamping channel, the blowing pipe is inserted between the top die and the bottom die, and the air outlet end of the blowing pipe blows air downward to blow the workpiece into the discharge channel. After that, the discharge push rod withdraws, the support block elastically resets, and the support block pushes the workpiece in the discharge channel to realize discharge. The discharge process is more automated and the discharge efficiency is high.

[0025] The beneficial effects of the drum brake pad stamping processing equipment provided by the present invention are: after the stamping is completed, the ejector rod can keep the top die at the bottom limit position, so that the top die can still press the workpiece after being separated from the punch, so that the workpiece is in a pressure-holding state, the stamping process and the pressure-holding process can be carried out at different positions, and in the batch processing process, one part can be stamped while the other part is being pressure-held, and there is no need to wait in vain and waste time during the stamping process, which effectively improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an illustrative and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0027] Figure 1 A schematic diagram of the three-dimensional structure of a drum brake pad stamping processing equipment provided by the present invention;

[0028] Figure 2 A schematic diagram of the three-dimensional structure of a turntable and a mold pressing component in a drum brake pad stamping processing equipment provided by the present invention;

[0029] Figure 3 A schematic diagram of the three-dimensional structure of a molded component in a drum brake pad stamping processing equipment provided by the present invention;

[0030] Figure 4 This is a structural schematic diagram of a drum brake pad stamping processing equipment provided by the present invention during loading;

[0031] Figure 5 This is a structural schematic diagram of a drum brake pad stamping processing equipment provided by the present invention during reset and discharge;

[0032] Figure 6 A three-dimensional cross-sectional view of a molded component in a drum brake pad stamping processing equipment provided by the present invention;

[0033] Figure 7 A schematic structural diagram of a bottom die in a drum brake pad stamping processing equipment provided by the present invention, viewed from above;

[0034] Figure 8 A schematic diagram of the structure of a bottom die and a support block in a drum brake pad stamping processing equipment provided by the present invention, viewed from above;

[0035] Figure 9 This is a schematic structural diagram from a top view of a bottom die and a support block in a drum brake pad stamping processing equipment provided by the present invention.

[0036] Description of reference numerals:

[0037] 1. Frame; 101. Working platform; 102. Operation box; 2. Press column; 3. Press plate; 4. Turntable; 5. Top die; 501. Slot; 6. Bottom die; 601. Punching channel; 602. Discharging channel; 603. Punching chamber; 7. Second connecting plate; 8. First connecting plate; 9. Vertical guide rod; 10. Fixed shaft; 11. Ejector rod; 12. Insert block; 13. Roller; 14. Elastic member 3; 15. Support plate; 16. Loading frame; 17. Blocking piece; 171. Bottom plate; 172. Vertical plate; 1 8. Baffle; 19. Feeding drive member; 20. Servo motor; 21. Connecting plate and guide rod; 22. Reset drive member; 23. Reset push rod; 24. Movable block; 25. Movable block guide rod; 26. Elastic member five; 27. Discharge push rod; 28. Blowing duct; 29. ​​Rack; 30. Gear; 31. Top block; 32. Support block; 33. Elastic member two; 34. Horizontal guide rod; 35. Elastic member one; 36. Scraper; 37. Sealing member guide rod; 38. Elastic member six; 39. Support platform. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0039] The following is one embodiment of a drum brake pad stamping processing equipment provided by the present invention:

[0040] like Figures 1-9 As shown, a drum brake pad stamping processing equipment includes a frame 1, a turntable 4, a molding component, a feeding mechanism, a punch, a reset mechanism and a discharge mechanism.

[0041] like Figure 1 As shown, the frame 1 is arranged on a horizontal ground, a working platform 101 is provided on the frame 1, an operating box 102 is provided below the working platform 101, and a servo motor 20 is provided in the operating box 102.

[0042] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5As shown, the turntable 4 is arranged horizontally and is rotatably mounted on a work platform 101 on the frame 1 about a vertically extending rotation axis. The loading station, stamping station, pressure holding station, and discharge station are evenly and sequentially arranged around the circumference of the turntable 4. A servo motor 20 is connected to the turntable 4 and is used to drive the turntable 4 to rotate 90 degrees in sequence to switch between the stations.

[0043] like Figure 2 As shown, there are four groups of molded components, and the four groups of molded components are evenly arranged on the turntable 4 along the circumference of the turntable 4. Figure 3 As shown, the molding assembly includes a bottom mold 6, a vertical guide rod 9, a top mold 5, a fixed shaft 10 and a top rod 11.

[0044] The bottom mold 6 is fixedly mounted on the turntable 4. Figure 3 、 Figure 7 As shown, the bottom mold 6 is provided with a stamping channel 601 running through it from top to bottom and a discharge channel 602 extending radially along the turntable 4. The discharge channel 602 is closed at one end near the center of the turntable 4 and open at the other end. The discharge channel 602 is located at the bottom end of the stamping channel 601 and is connected to the stamping channel 601.

[0045] like Figure 8 、 Figure 9 As shown, a support block 32 is slidably mounted within the discharge channel 602, adapted to fit within the discharge channel 602. The top surface of the support block 32 is curved, and one end of the support block 32, near the center of the turntable 4, is connected to a horizontal guide rod 34 extending radially along the turntable 4. The horizontal guide rod 34 slides radially along the turntable 4 and penetrates the bottom mold 6. A second elastic member 33 is connected between the support block 32 and the bottom mold 6. The second elastic member 33 is a compression spring capable of radially extending and contracting along the turntable 4. The second elastic member 33 is sleeved on the outside of the horizontal guide rod 34. The second elastic member 33 applies an elastic force to the support block 32, directed away from the center of the turntable 4, causing the support block 32 to naturally block the bottom of the stamping channel 601, thereby forming a stamping chamber 603 in the space above the support block 32 in the stamping channel 601.

[0046] like Figure 3 As shown, there are four vertical guide rods 9 , which are respectively arranged at the four corners of the bottom mold 6 . The four vertical guide rods 9 are all fixedly connected to the bottom mold 6 , so that the vertical guide rods 9 and the turntable 4 are relatively fixed.

[0047] The top mold 5 is located above the bottom mold 6 and is slidably mounted on four vertical guide rods 9. A third elastic member 14 is connected between the top mold 5 and the bottom mold 6. The third elastic member 14 is a compression spring that can expand and contract vertically and is mounted on the outside of the vertical guide rods 9. Four upward-facing slots 501 are provided on the top surface of the top mold 5. The four slots 501 are arranged in a square pattern.

[0048] There are two fixed shafts 10 , and each fixed shaft 10 is connected between the top ends of two vertical guide rods 9 located on the same side of the discharge channel 602 .

[0049] Four push rods 11 are provided, with two pivotally mounted on each fixed shaft 10. The top ends of the push rods 11 are pivotally mounted on the fixed shaft 10, and a torsion spring is connected between the push rods 11 and the fixed shaft 10. When the torsion spring is not subjected to external forces, the push rods 11 remain in an inclined state, with the push rods 11 on the two fixed shafts 10 symmetrically positioned and approaching each other from top to bottom. The four connection points between the four push rods 11 and the fixed shaft 10 are aligned vertically with the four slots 501 described above.

[0050] The bottom end of the push rod 11 is curved, and an insert 12 is provided at the bottom end of the push rod 11. A roller 13 is rotatably mounted on the bottom of the insert 12. The insert 12 is slidably mounted on the push rod 11 along the length of the push rod 11. An elastic member 4 is connected between the insert 12 and the push rod 11. The elastic member 4 is a compression spring that can extend and retract along the length of the push rod 11. The elastic member 4 applies an elastic force to the insert 12 away from the push rod 11, causing the insert 12 to extend outside the push rod 11. When the top mold 5 moves downward to the bottom limit position, the push rod 11 can be vertically stuck between the fixed shaft 10 and the top mold 5.

[0051] like Figure 4 As shown, the feeding mechanism is installed on the frame 1 and is located at the feeding station. The feeding mechanism includes a feeding drive member 19, a connecting plate 8, a support plate 15, a feeding box, an elastic member 35 and a baffle 18.

[0052] The feeding drive member 19 adopts a feeding cylinder, which is installed on the frame 1 and is located below the turntable 4. The output end of the feeding cylinder can reciprocate along the radial direction of the turntable 4.

[0053] The connecting plate 8 is located outside the turntable 4 and is vertically connected to the output end of the feeding cylinder. A connecting plate guide rod 21 is vertically connected to the connecting plate 8, and the connecting plate guide rod 21 is inserted into the frame 1 in a horizontal sliding direction.

[0054] The support plate 15 is vertically connected to the top of the connecting plate 8 and is located on the side of the connecting plate 8 facing the turntable 4. The support plate 15 is provided with a square through-hole running through it from top to bottom, and a scraper 36 is vertically connected to the end of the support plate 15 facing away from the connecting plate 8.

[0055] The loading box includes a loading frame 16 and a blocking member 17. The loading frame 16 is a square frame structure with four sides closed. The loading frame 16 is connected to the support plate 15 and is opposite to the above-mentioned square through-holes.

[0056] The blocking member 17 is located on the side of the connecting plate 18 facing the turntable 4. The blocking member 17 is an L-shaped plate structure comprising a bottom plate 171 arranged horizontally and affixed to the bottom surface of the support plate 15, and a vertical plate 172 perpendicularly connected to the end of the bottom plate 171 facing away from the turntable 4. The end of the vertical plate 172 facing away from the bottom plate 171 is connected to a blocking member guide rod 37 extending radially along the turntable 4. The blocking member guide rod 37 is slidably mounted on the connecting plate 18.

[0057] The elastic member 35 is connected between the vertical plate 172 and the connecting plate 8. The elastic member 35 is a compression spring that can be expanded and contracted along the radial direction of the turntable 4. The elastic member 35 is sleeved on the outer side of the blocking member guide rod 37.

[0058] The baffle 18 is connected to the frame 1 and is arranged vertically. The baffle 18 and the vertical plate 172 block each other in the radial direction of the turntable 4 . The baffle 18 is located on the side of the vertical plate 172 facing the turntable 4 .

[0059] The loading drive member 19 can drive the connecting plate 8 to move toward the turntable 4, so as to drive the support plate 15 and the loading frame 16 to move toward the turntable 4. The connecting plate 8 drives the blocking member 17 to move synchronously with the loading frame 16 toward the turntable 4 through the elastic member 35. When the end of the bottom plate 171 of the blocking member 17 close to the turntable 4 moves to above the stamping chamber 603, the vertical plate 172 is blocked by the baffle 18, and the blocking member 17 no longer moves synchronously with the loading frame 16. The loading frame 16 continues to move toward the center of the turntable 4. The bottom end of the loading frame 16 is no longer blocked by the blocking member 17, and the material in the loading frame 16 falls into the stamping chamber 603 to realize loading.

[0060] like Figure 1 As shown, the punch is located at the stamping station and includes a pressure column 2 and a pressure plate 3 vertically connected to the pressure column 2. The bottom end of the pressure column 2 is located below the pressure plate 3. The pressure column 2 is vertically opposite to the middle of the top die 5 in the die pressing assembly rotated to the stamping station. The spacing between the two ejector rods 11 on the two fixed shafts 10 when swung to the vertical state is equal to the width of the pressure plate 3. A lifting cylinder is provided on the frame 1, and the pressure column 2 is connected to the drive output end of the lifting cylinder. The pressure column 2 and the pressure plate 3 are driven by the lifting cylinder to move back and forth.

[0061] like Figure 5 、 Figure 6 As shown, the reset mechanism is located at the discharging station, and the reset mechanism includes a reset driving member 22, a connecting plate 27, a reset push rod 23, a top block 31, a gear 30 and a rack 29.

[0062] The reset driving member 22 adopts a reset cylinder, which is installed on the frame 1 and located below the turntable 4. The output end of the reset cylinder can slide back and forth along the radial direction of the turntable 4.

[0063] Connecting plate 27 is vertically connected to the output end of the reset cylinder. A movable block 24 is provided on the top of connecting plate 27. The bottom of the movable block 24 is connected to a vertically extending movable block guide rod 25. The movable block guide rod 25 slides up and down and is passed through connecting plate 27. An elastic member 5 26 is connected between the bottom end of the movable block guide rod 25 and connecting plate 27. The elastic member 5 26 is a compression spring and is sleeved on the outer side of the movable block guide rod 25.

[0064] Two reset push rods 23 are provided. The two reset push rods 23 extend horizontally and are parallel to each other. The two reset push rods 23 are both vertically connected to the above-mentioned movable block 24 and are located on the side of the movable block 24 facing the turntable 4.

[0065] Four top blocks 31 are provided, one at the bottom of each slot 501, and positioned below the insert block 12 inserted into the slot 501. Specifically, the top block 31 is a short, vertically extending screw rod, which is fixedly mounted on the top mold 5 and can slide vertically on the top mold 5. Specifically, the fixing method is as follows: a vertically extending square rod is connected to the bottom end of the screw rod, and a vertically extending square hole is provided in the top mold 5, into which the square rod is inserted.

[0066] like Figure 6 As shown, there are four gears 30, each of which is spirally mounted on the outer side of each top block 31. A gear groove is provided within the bottom mold 6 to accommodate the gears 30. The gears 30 are located within the groove and are blocked by the groove walls, preventing them from moving up and down. The gears 30 and top blocks 31 are engaged by a spiral transmission mechanism, and when the gears 30 rotate, they drive the top blocks 31 to move up and down.

[0067] Two racks 29 are provided, one located next to each pair of gears 30 on the same side of the punch chamber 603. The top die 5 is provided with a strip-shaped chute, through which the racks 29 slide. A six-elastic member 38 is connected between the racks 29 and the top die 5. This spring is a compression spring that can expand and contract along the length of the racks 29. Each rack 29 meshes with two corresponding gears 30, and the two racks 29 are collinear with the two reset push rods 23.

[0068] When the reset driving member 22 drives the connecting plate 2 7 to move toward the turntable 4, the two reset push rods 23 are respectively inserted into the two bar-shaped slide grooves and push the two racks 29 to move toward the center of the turntable 4, driving the gear 30 to rotate, and the gear 30 drives the top block 31 to move upward, so that the top block 31 pushes the insert block 12 and the roller 13 to the outside of the slot 501, and then the push rod 11 can swing upward and reset under the action of the torsion spring, and the top mold 5 elastically resets upward under the action of the elastic member 3 14.

[0069] like Figure 5As shown, the discharge mechanism is also located at the discharge station and includes a blowing duct 28 and a discharge push rod 27. Both the blowing duct 28 and the discharge push rod 27 extend radially along the turntable 4. The blowing duct 28 and the discharge push rod 27 are connected to the second connecting plate 7 and are located on the side of the second connecting plate 7 facing the turntable 4. The blowing duct 28 corresponds to the area between the reset top mold 5 and the bottom mold 6 in the radial direction of the turntable 4. The discharge push rod 27 corresponds to the support block 32 in the radial direction of the turntable 4. The blowing duct 28 is shorter than the reset push rod 23 and the discharge push rod 27.

[0070] A support platform 39 is also provided at the discharge station. The support platform 39 is connected to the frame 1. The support platform 39 is opposite to the discharge channel 602 on the bottom mold 6 in the molding assembly that rotates to the discharge station. The top surface of the support platform 39 is flush with the top surface of the turntable 4.

[0071] When the present invention is in use, the friction material to be stamped is placed into the loading box, and then the loading drive 19 is activated. The loading drive 19 drives the connecting plate 8 to move toward the turntable 4, and inserts the loading box between the top die 5 and the bottom die 6. When the loading box moves to the top of the stamping chamber 603 on the bottom die 6, the baffle 18 contacts the vertical plate 172. The vertical plate 172 and the bottom plate 171 are blocked by the baffle 18 and no longer move forward. The connecting plate 8 drives the support plate 15 and the loading frame 16 to continue moving forward. The loading frame 16 leaves the bottom plate 171, and the bottom opening of the loading frame 16 is exposed. The material between the loading frame 16 and the bottom plate 171 falls into the stamping chamber 603, and the loading is completed.

[0072] After the loading is completed, the loading drive 19 drives the connecting plate 8 to move back, driving the support plate 15 to move back. During this process, the scraper 36 is driven back by the support plate 15. The scraper 36 flattens the material accumulated in the stamping chamber 603, making the material in the stamping chamber 603 more evenly distributed and the stamping effect better.

[0073] Afterwards, the servo motor 20 drives the turntable 4 to rotate 90 degrees, and the loaded die-stamping assembly rotates to the stamping station for stamping, and the other set of die-stamping assemblies rotates to the loading station for loading. At the stamping station, the punch moves downward, the pressure column 2 contacts the top die 5, pushing the top die 5 downward, the pressure plate 3 contacts the ejector pin 11, pushing the ejector pin 11 downward, and the stamping is completed when the top die 5 moves downward to the bottom limit position. At the same time, the ejector pin 11 swings to a vertical state, and the insert 12 is inserted into the slot 501. Then the punch moves upward to leave the top die 5. The position of the top die 5 is locked by the ejector pin 11. The top die 5 is fixed at the bottom limit position and is tightly pressed on the stamped workpiece.

[0074] The servo motor 20 drives the turntable 4 to rotate 90 degrees again. The stamped molded assembly rotates to the holding pressure station for holding pressure, and the molded assembly with the material loaded rotates to the stamping station for stamping. After the holding pressure is completed, the turntable 4 rotates 90 degrees again. The molded assembly that has undergone holding pressure rotates to the discharge station. The reset drive member 22 drives the connecting plate 2 7 toward the turntable 4, driving the reset push rod 23, the discharge push rod 27, and the blowing duct 28 toward the turntable 4. The reset push rod 23 drives the rack 29 to move. The rack 29 drives the gear 30 to rotate. The gear 30 drives the top block 31 upward. The top block 31 pushes the insert block 12 and the roller 13 to the outside of the slot 501. The push rod 11 swings upward and resets under the action of the torsion spring. The top mold 5 moves upward and resets under the action of the elastic member 3 14. At the same time, the discharge push rod 27 pushes the support block 32 toward the center of the turntable 4, causing the support block 32 to move to the side of the stamping channel 601.

[0075] Afterwards, the outlet end of the blowing duct 28 is inserted between the top die 5 and the bottom die 6 and moved above the punching channel 601. The outlet end of the blowing duct 28 blows air downward, blowing the workpiece stuck in the punching channel 601 into the discharge channel 602. The reset drive member 22 then drives the connecting plate 2 7 to move back, driving the reset push rod 23 and the discharge push rod 27 to exit the discharge channel 602. After the reset push rod 23 disengages from the top die 5, it moves downward and resets under the action of the elastic member 5 26. The support block 32 resets under the action of the elastic member 2 33 and pushes the workpiece along the discharge channel 602 toward the open end of the discharge channel 602, causing the center of gravity of the workpiece to move to the outside of the turntable 4. At this time, the workpiece is supported by the support platform 39 and will not fall from the turntable 4 temporarily. At this time, the workpiece is not completely separated from the discharge channel 602 and can still be driven by the turntable 4 to rotate synchronously with the obstruction of the sidewall of the discharge channel 602. Then the turntable 4 continues to rotate 90 degrees, and the workpiece is driven to separate from the support platform 39 during the rotation process. At this time, the workpiece falls from the turntable 4 under the action of its own weight, and the material is discharged.

[0076] After completing the reset and discharge at the discharge station, the molded component rotates with the turntable 4 to the loading station and continues to repeat the above-mentioned processing actions.

[0077] The present invention clamps the top die 5 at the bottom limit position through the push rod 11 to maintain the pressure of the workpiece, so that the stamping process and the pressure holding process can be carried out in different spaces. While one brake pad is being stamped, the other brake pad can be maintained at pressure. There is no need to wait during the pressure holding period, which can save time and effectively improve production efficiency.

[0078] In this embodiment, the feeding mechanism includes a feeding box, and the material is injected into the stamping chamber 603 through the feeding box to achieve feeding. In other embodiments, the feeding mechanism includes a conveying pipe and a conveying auger installed inside the conveying pipe. The conveying pipe and the conveying auger move to between the top mold 5 and the bottom mold 6 after the top mold 5 and the bottom mold 6 are separated, and then the conveying auger is driven to rotate, so that the material falls into the stamping chamber 603 from the outlet of the conveying pipe.

[0079] In this embodiment, the reset mechanism includes a reset push rod 23 and a push block 31. The reset push rod 23 is connected to the push block 31 through a rack 29 and a gear 30 to drive the push block 31 to move upward to push the insert block 12 out of the slot 501. In other embodiments, the reset mechanism includes a reset push rod 23 and a slider. The slider is slidably mounted on the bottom mold 6 and is located below the insert block 12. A push inclined surface is provided on the top of the slider. The reset push rod 23 can push the slider to move, so that the slider pushes the insert block 12 upward through the push inclined surface, thereby pushing the insert block 12 out of the slot 501.

Claims

1. A drum brake pad stamping processing equipment, comprising a frame, a die pressing assembly and a punch that can move up and down, characterized in that: The frame is also provided with a turntable which is arranged horizontally and can rotate around a vertically extending axis. The outer circumference of the turntable is provided with a loading station, a stamping station, a pressure holding station and a discharge station arranged in sequence and evenly. The punch is located at the stamping station. The molding assembly is provided with four groups and is evenly arranged on the turntable along the circumference of the turntable. The molding assembly includes a bottom mold fixed on the turntable, a top mold elastically movable up and down and arranged above the bottom mold, a fixed shaft fixed on the turntable and located above the top mold, and a top rod rotatably mounted on the fixed shaft. A torsion spring is connected between the top rod and the fixed shaft to keep the top rod in an inclined state. The bottom end of the top rod is provided with an insert block that can elastically move along the rod length direction of the top rod. The top mold is provided with a slot with an upward opening. The turntable can rotate in sequence at a set angle to drive each die pressing component to rotate to each station in sequence. When the die pressing component rotates to the stamping station, the punch pushes the top die to move downward for stamping, and pushes the ejector rod to swing downward. When the top die moves to the bottom limit position, the ejector rod swings to a vertical state, and the insert is inserted into the slot when the ejector rod swings to a vertical state. The punch includes a pressure column and a pressure plate vertically connected to the pressure column. The bottom end of the pressure column is located below the pressure plate. When the punch moves downward, the pressure column pushes the top die to move downward, and the pressure plate pushes the ejector rod to swing downward. A feeding mechanism is also provided on the frame, which is located at the feeding station. The feeding mechanism includes a feeding box that can move radially along the turntable. The feeding box includes a feeding frame that is closed on all sides and penetrates from top to bottom, and a sealing member for sealing the bottom of the feeding frame. The sealing member and the feeding frame can move relative to each other when the feeding box moves to above the bottom mold, so as to open the bottom of the feeding box and allow the material in the feeding box to fall onto the bottom mold.

2. The drum brake pad stamping equipment according to claim 1, characterized in that: The loading frame and the blocking piece can slide relative to each other in the radial direction of the turntable, and an elastic piece that can expand and contract in the radial direction of the turntable is connected between the two. The elastic piece keeps the blocking piece in a state relative to the loading frame in the upper and lower directions. The loading mechanism also includes a baffle installed on the frame. The baffle and the blocking piece block each other in the radial direction of the turntable. When the loading box moves to the set position above the bottom mold, the blocking piece is blocked by the baffle and staggered with the loading frame, so that the material in the loading box falls on the bottom mold.

3. A drum brake pad stamping equipment according to claim 1 or 2, characterized in that: The frame is also provided with a reset mechanism, which is located at the discharge station. The reset mechanism includes a top block and a reset push rod. The top block is movably installed on the top mold and is located below the insert block inserted into the slot. The reset push rod is movably installed on the frame. The reset push rod is transmission-connected to the top block. The reset push rod can move toward the turntable to drive the top block to move upward, so that the top block pushes the insert block out of the slot.

4. The drum brake pad stamping equipment according to claim 3, characterized in that: The top block is a vertically extending screw, which is fixed in the top mold. A gear is spirally sleeved on the outside of the screw, and the gear is fixed in the upper and lower positions on the top mold. A rack that can slide elastically in the horizontal direction is provided in the top mold, and the rack is engaged with the gear. The reset push rod can push the rack to slide in the process of moving toward the turntable to drive the gear to rotate, thereby driving the screw to move upward to push the insert out of the slot.

5. The drum brake pad stamping equipment according to claim 4, characterized in that: The bottom die is provided with a stamping channel running through from top to bottom and a discharge channel extending radially along the turntable. The discharge channel is closed at one end close to the center of the turntable and open at the other end. The discharge channel is located at the bottom of the stamping channel and is connected to the stamping channel. A support block is slidably installed in the discharge channel. A second elastic member is connected between the support block and the bottom die. The second elastic member applies an elastic force to the support block toward the center of the turntable, so that the support block remains in a state of blocking the bottom end of the stamping channel. The bottom end of the stamping channel is blocked by the support block to form a stamping chamber.

6. The drum brake pad stamping equipment according to claim 5, characterized in that: The frame is provided with a discharge mechanism, which is located at the discharge station. The discharge mechanism includes a blowing pipe and a discharge push rod. The blowing pipe is movably mounted on the frame along the radial direction of the turntable. The air outlet end of the blowing pipe lags behind the end of the reset push rod close to the turntable in the horizontal direction, so that the air outlet end of the blowing pipe can be inserted between the top mold and the bottom mold after the top mold is reset upward. The discharge push rod and the support block block each other in the radial direction of the turntable, and the end of the discharge push rod close to the turntable is ahead of the air outlet end of the blowing duct in the horizontal direction, so that the discharge push rod can push the support block away before the air outlet end of the blowing duct moves to above the stamping chamber. The air outlet end of the blowing duct can blow air downward to blow the brake pad stuck in the stamping channel into the discharge channel. After the brake pad enters the discharge channel, the discharge push rod moves back to the turntable to elastically reset the support block and push the center of gravity of the brake pad to the outside of the turntable.

Images